global -- pope benedict pope benedict and 16 -- pope benedict xvi hit his head on a trip to mexico, but they say that had nothing to do with his resignation. this adds to questions about the gravity of the pontiff's condition. on tuesday, the vatican said that pope benedict has a pacemaker and that he had his batteries replaced just three months ago. the effective date of his resignation is the 28th of this month. in business news, billionaire warned buffett is buying the ketchup company -- warren buffett is buying the ketchup company heinz. it is a deal valued at $20 billion. the company headquarters will stay in pittsburgh. he says that congress, the white house, and advocates for seniors have all, in his words, really walked away from social security, leaving the program quote fraying because -- program "fraying." policymakers "use it as a tool of political rhetoric." he says benefit talk -- cuts and tax increases are inevitable, and he questions whether congress is up to the task qt finished up his six-year year term as commissioner yesterday -- to the task. he finished up his six-y